Question
PSLE
A box contained gold balls and brown balls. 30% of the balls were brown. After some white balls were added to the box, 15% of the balls were brown. What percentage of the balls in the box were white?
2 m

Click button first when a symbol is required. X

PSLE
A box contained gold balls and brown balls. 30% of the balls were brown. After some white balls were added to the box, 15% of the balls were brown. What percentage of the balls in the box were white?